diff --git a/mainwindow.ui b/mainwindow.ui
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -419,6 +419,11 @@
         </item>
         <item>
          <widget class="QPlainTextEdit" name="ptTextView">
+          <property name="font">
+           <font>
+            <family>Monospace</family>
+           </font>
+          </property>
           <property name="readOnly">
            <bool>true</bool>
           </property>